Probe the PCIe driver in fs_initcall() instead of module_init()
to assure that pci_assign_unassigned_resources() will be called
early. This function is called in dw_pcie_host_init(), which is
in turn called from imx6_add_pcie_port(), which is called from
imx6_pcie_probe(). If this is not called early, we will hit
resource collisions since pcieport driver is then probed way too
late.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>
This adds internal PCI controller driver for R-Car Gen2 SoC. There are
three PCI controllers available with only a single EHCI/OHCI device
built-in on each PCI bus. This gives us three USB channels. Channel 0 is
shared with the USBHS device, while channel 2 is shared with the USBSS.
The PCI controllers do not support I/O port space mapping, and it is not
needed here.
Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
imx6_pcie_of_match is always compiled in because PCI_IMX6 depends on
SOC_IMX6Q, which only supports OF build. Hence of_match_ptr is not
required.
[bhelgaas: add changelog details from Shawn]
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Sean Cross <xobs@kosagi.com>
Commit 2dc4128 (ACPI / hotplug / PCI: Avoid doing too much for
spurious notifies) changed the enable_slot() to check return value of
pci_scan_slot() and if it is zero return early from the function. It
means that there were no new devices in this particular slot.
However, if a device appeared deeper in the hierarchy the code now
ignores it causing things like Thunderbolt chaining fail to recognize
new devices.
The problem with Alex Williamson's machine was solved with commit
a47d8c8 (ACPI / hotplug / PCI: Avoid parent bus rescans on spurious
device checks) and hence we should be able to restore the original
functionality that we always rescan on bus check notification.
On a device check notification we still check what acpiphp_rescan_slot()
returns and on zero bail out early.
Fixes: 2dc41281b1 (ACPI / hotplug / PCI: Avoid doing too much for spurious notifies)
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Previously, if kmalloc() failed, we claimed "PME# enabled" in dmesg,
even though we didn't add the device to the pci_pme_list. This prints
a more correct warning.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
A longer link startup timeout is required when certain PCI switches are
attached to the root complex. This was tested with a Pericom switch
and a PLX switch.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Tim Harvey <tharvey@gateworks.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
This driver is DT only. Hence of_match_ptr is not required.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
An imprecise abort is triggered when a port behind a switch is accessed
and no device is present. At enumeration, imprecise aborts are not enabled
thus this ends up getting deferred until the kernel has completed init. At
that point we must not adjust PC - the handler must do nothing, but a
handler must exist.
This fixes random crashes that occur right after freeing init.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
Currently, pci_enable_msi() and pci_enable_msix() return success even if
the device power state is not D0. However, we don't write the MSI message
to the device registers, and the registers will never be updated later.
This patch makes pci_enable_msi() and pci_enable_msix() return an error
instead.
[bhelgaas: changelog]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
There is an error message within devm_ioremap_resource()
already, so remove the dev_err() call to avoid redundant
error message.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
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Merge tag 's3c24xx-dma' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers
From Kukjin Kim, this branch adds device-tree support to the DMA controller
on the older Samsung SoCs. It also adds support for one of the missing SoCs
in the family (2410).
The driver has been Ack:ed by Vinod Koul, but is merged through here due
to dependencies with platform code.
* tag 's3c24xx-dma' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: S3C24XX: add dma pdata for s3c2410, s3c2440 and s3c2442
dmaengine: s3c24xx-dma: add support for the s3c2410 type of controller
ARM: S3C24XX: Fix possible dma selection warning
ARM: SAMSUNG: set s3c24xx_dma_filter for s3c64xx-spi0 device
ARM: S3C24XX: add platform-devices for new dma driver for s3c2412 and s3c2443
dmaengine: add driver for Samsung s3c24xx SoCs
ARM: S3C24XX: number the dma clocks
+ Linux 3.12-rc3
Signed-off-by: Olof Johansson <olof@lixom.net>
Cleanup arch specific pci messages. Remove unhelpful messages and
replace others with entries in the debugfs.
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Several architectures open code effectively the same code block for
finding and mapping PCI irqs. This patch consolidates it down to a
single function.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
All the callers of irq_create_of_mapping() pass the contents of a struct
of_phandle_args structure to the function. Since all the callers already
have an of_phandle_args pointer, why not pass it directly to
irq_create_of_mapping()?
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
struct of_irq and struct of_phandle_args are exactly the same structure.
This patch makes the kernel use of_phandle_args everywhere. This in
itself isn't a big deal, but it makes some follow-on patches simpler.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The OF irq handling code has been overloading the term 'map' to refer to
both parsing the data in the device tree and mapping it to the internal
linux irq system. This is probably because the device tree does have the
concept of an 'interrupt-map' function for translating interrupt
references from one node to another, but 'map' is still confusing when
the primary purpose of some of the functions are to parse the DT data.
This patch renames all the of_irq_map_* functions to of_irq_parse_*
which makes it clear that there is a difference between the parsing
phase and the mapping phase. Kernel code can make use of just the
parsing or just the mapping support as needed by the subsystem.
The patch was generated mechanically with a handful of sed commands.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
- mvebu
- pcie
- dynamic link up detection
- add IO wrappers
- declare some local functions static
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Merge tag 'drivers-3.13-2' of git://git.infradead.org/linux-mvebu into next/drivers
From Jason Cooper:
mvebu driver changes for v3.13 (round 2)
- mvebu
- pcie
- dynamic link up detection
- add IO wrappers
- declare some local functions static
* tag 'drivers-3.13-2' of git://git.infradead.org/linux-mvebu:
PCI: mvebu: make local functions static
PCI: mvebu: add I/O access wrappers
PCI: mvebu: Dynamically detect if the PEX link is up to enable hot plug
Signed-off-by: Kevin Hilman <khilman@linaro.org>
The WARN_ON() in acpiphp_enumerate_slots() triggers unnecessarily for
devices whose bridges are going to be handled by native PCIe hotplug
(pciehp) and the simplest way to prevent that from happening is to
drop the WARN_ON().
References: https://bugzilla.kernel.org/show_bug.cgi?id=62831
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
One of the error code paths in acpiphp_enumerate_slots() is missing
a pci_dev_put(bridge->pci_dev) call, so add it.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
- irqchip
- add MSI support for armada-370/XP
- pci
- add MSI support
- add support for Marvell Dove SoCs
- mvebu (soc changes depending on the pci and irq changes)
- probe mbus windows via DT
- probe pcie and clock via DT
- docs for mvebu
- update gated clock documentation
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Merge tag 'drivers-3.13' of git://git.infradead.org/linux-mvebu into next/drivers
From Jason Cooper:
mvebu drivers changes for v3.13
- irqchip
- add MSI support for armada-370/XP
- pci
- add MSI support
- add support for Marvell Dove SoCs
- mvebu (soc changes depending on the pci and irq changes)
- probe mbus windows via DT
- probe pcie and clock via DT
- docs for mvebu
- update gated clock documentation
* tag 'drivers-3.13' of git://git.infradead.org/linux-mvebu:
ARM: mvebu: fix gated clock documentation
ARM: dove: remove legacy pcie and clock init
ARM: dove: switch to DT probed mbus address windows
PCI: mvebu: add support for Marvell Dove SoCs
PCI: mvebu: add support for reset on GPIO
PCI: mvebu: remove subsys_initcall
PCI: mvebu: increment nports only for registered ports
PCI: mvebu: move clock enable before register access
PCI: mvebu: add support for MSI
irqchip: armada-370-xp: implement MSI support
irqchip: armada-370-xp: properly request resources
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Without irq_create_mapping(), the correct IRQ number cannot be
provided. In this case, it makes problems such as NULL dereference.
Thus, irq_create_mapping() should be added for MSI.
Suggested-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The following variables and functions are used only in pcie-designware.c,
so make them static:
global_io_offset
dw_pcie_rd_own_conf()
dw_pcie_wr_own_conf()
dw_pcie_setup()
dw_pcie_scan_bus()
dw_pcie_map_irq()
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
mvebu_pcie_add_bus(), mvebu_pcie_align_resource() are used only
in this file. Thus, these local functions should be staticized
in order to fix the following sparse warnings:
drivers/pci/host/pci-mvebu.c:684:6: warning: symbol 'mvebu_pcie_add_bus' was not declared. Should it be static?
drivers/pci/host/pci-mvebu.c:690:17: warning: symbol 'mvebu_pcie_align_resource' was not declared. Should it be static?
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This change adds wrapper functions for MMIO access to PCIe IP block.
And some 8/16-bit access are replaced by 32-bit.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Otherwise hotplugging the PEX doesn't work at all since the driver
detects the link state at probe time. Simply replacing the two tests
of haslink with a register read is enough to fix it.
Tested on kirkwood with repeated plug/unplug of the link partner.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
88d26136 ("PM: Prevent runtime suspend during system resume") removed the
pm_runtime_put_sync() from pci_pm_complete() to PM core code
device_complete().
Here the pci_pm_complete() is doing the same work which can be done in
device_complete(), so we can remove it directly.
Signed-off-by: Liu Chuansheng <chuansheng.liu@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
local_cpus_show() and local_cpulist_show() are almost the same.
This adds a new helper function, pci_dev_show_local_cpu(), to simplify
code.
The same strategy is already used by cpuaffinity_show() and
cpulistaffinity_show().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
pci_dev_pm_ops is local to pci-driver.c. Make it static.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Local variables used only in this file are made static.
[bhelgaas: also make pci_dev_attrs[] static (from Fengguang)]
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The dev_attrs field of struct bus_type is going away soon, dev_groups
should be used instead. This converts the PCI bus code to use the
correct field.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The drv_attrs field of struct bus_type is going away soon, drv_groups
should be used instead. This converts the PCI bus code to use the
correct field.
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The bus_attrs field of struct bus_type is going away soon, dev_groups
should be used instead. This converts the PCI bus code to use the
correct field.
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add the missing clk_disable_unprepare() before return
from exynos_pcie_probe() in the error handling case.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
This patch adds a compatible for the PCIe controller found on Marvell
Dove SoCs. Binding documentation and Kconfig entry are also updated.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This patch adds a check for DT passed reset-gpios property and deasserts/
asserts reset pin on probe/remove with configurable delay. Corresponding
binding documentation is also updated.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This removes the subsys_initcall from the driver and converts it to
a normal platform_driver. Also, drvdata is set and a remove functions
is added to disable the clock and free resources. As pci driver removal
currently is not supported, set .suppress_bind_attrs to permit unbinding.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
The number of ports is probed by counting the number of available child nodes.
Later on, the registration of a port can fail and cause a mismatch between
the ->nports counter and registered ports. This patch modifies the counting
strategy, to make ->nports represent the number of registered ports instead
of the number of available childs.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
The clock passed to PCI controller found on MVEBU SoCs may come from a
clock gate. This requires the clock to be enabled before any registers
are accessed. Therefore, move the clock enable before register iomap to
ensure it is enabled.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit adds support for Message Signaled Interrupts in the
Marvell PCIe host controller. The work is very simple: it simply gets
a reference to the msi_chip associated to the PCIe controller thanks
to the msi-parent DT property, and stores this reference in the
pci_bus structure. This is enough to let the Linux PCI core use the
functions of msi_chip to setup and teardown MSIs.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Ben Herrenschmidt found that commit 928bea9648 ("PCI: Delay enabling
bridges until they're needed") breaks PCI in some powerpc environments.
The reason is that the PCIe port driver will call pci_enable_device() on
the bridge, so the device is enabled, but skips pci_set_master because
pcie_port_auto and no acpi on powerpc.
Because of that, pci_enable_bridge() later on (called as a result of the
child device driver doing pci_enable_device) will see the bridge as
already enabled and will not call pci_set_master() on it.
Fixed by add checking in pci_enable_bridge, and call pci_set_master
if driver skip that.
That will make the code more robot and wade off problem for missing
pci_set_master in drivers.
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pci/misc:
PCI: Remove unused PCI_MSIX_FLAGS_BIRMASK definition
PCI: acpiphp_ibm: Convert to dynamic debug
PCI: acpiphp: Convert to dynamic debug
PCI: Remove Intel Haswell D3 delays
PCI: Pass type, width, and prefetchability for window alignment
PCI: Document reason for using pci_is_root_bus()
PCI: Use pci_is_root_bus() to check for root bus
PCI: Remove unused "is_pcie" from pci_dev structure
PCI: Update pci_find_slot() description in pci.txt
[SCSI] qla2xxx: Use standard PCIe Capability Link register field names
PCI: Fix comment typo, remove unnecessary !! in pci_is_pcie()
PCI: Drop "setting latency timer" messages
Add support for the PCIe port present on the i.MX6 family of controllers.
These use the Synopsis Designware core tied to their own PHY.
Signed-off-by: Sean Cross <xobs@kosagi.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
* pci/host-exynos:
PCI: exynos: Turn off power of phy block when link failed
PCI: exynos: Add support for MSI
MAINTAINERS: Add Jingoo Han as Samsung Exynos PCIe driver maintainer
The drv_attrs field of struct bus_type is going away soon, drv_groups
should be used instead. This converts the PCI bus code to use the
correct field.
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
